Added to the many other things I put in whey protein shakes and didn't notice any difference in energy level, but may be difficult for me to review that way because what I already add keeps me full for 5 hours. However, package is only 4 ounces and if you use the suggested 1 T. it will be gone in no time. For me, I just can't justify the price of this product for the amount you get even though it has health benefits.